Word Origin
from the same as ereb
Definition
probably a swarm
NASB Translation
swarm of flies (1), swarms (7), swarms of flies (1).

עָרֹב₉ noun masculine^{Ex 8:20} probably swarm (mixture, from incessant, involved motion; Lag^{BN 112 doubts}); — of plague of stinging flies, coming in a swarm (see Di^Ex) Exodus 8:17 (twice in verse) + 5 t. 8(J), Psalm 78:45; Psalm 105:31.

הֶ֣עָרֹ֔ב הֶעָרֹ֑ב הֶעָרֹ֔ב הֶעָרֹ֗ב הֶעָרֹֽב׃ הערב הערב׃ עָ֭רֹב עָרֹ֑ב עָרֹ֣ב ערב ‘ā·rōḇ ‘ārōḇ aRo he‘ārōḇ he·‘ā·rōḇ heaRoInterlinear Greek • Interlinear Hebrew • Strong's Numbers • Englishman's Greek Concordance • Englishman's Hebrew Concordance • Parallel Texts